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Linking 1D Stellar Evolution to 3D Hydrodynamical Simulations

Hirschi, Raphael

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Abstract

In this contribution we present initial results of a study on convective boundary mixing (CBM) in massive stellar models using the GENEVA stellar evolution code. Before undertaking costly 3D hydrodynamic simulations, it is important to study the general properties of convective boundaries, such as the: composition jump; pressure gradient; and `stiffness'. Models for a 15Mo star were computed. We found that for convective shells above the core, the lower (in radius or mass) boundaries are `stiffer' according to the bulk Richardson number than the relative upper (Schwarzschild) boundaries. Thus, we expect reduced CBM at the lower boundaries in comparison to the upper. This has implications on flame front propagation and the onset of novae.

Acceptance Date Oct 28, 2014
Publication Date Jan 23, 2015
Journal Proceedings of the International Astronomical Union
Print ISSN 1743-9213
Publisher Cambridge University Press
Pages 98-99
DOI https://doi.org/10.1017/S1743921314006371
Keywords convection, hydrodynamics, stellar dynamics, turbulence, stars, evolution, interiors
Publisher URL http://dx.doi.org/10.1017/S1743921314006371

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